Everything in this book that is narrated from Yahya ibn Abdullah has been transmitted by me from Ahmad ibn Al-Husayn Al-Qattan, from Ahmad ibn Muhammad ibn Sa'id Al-Hamadani, the freed servant (mawla) of Banu Hashim, from Abdur Rahman ibn Ja'far Al-Hariri, from Yahya ibn Abdullah ibn Muhammad ibn Umar ibn Ali ibn Abi Talib, peace be upon him.